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From:Evolution (Vol. 48, Issue 2) Peer-ReviewedThe anatomy of the nasal conchae of fossil reptiles, birds and mammals was examined with respect to function. The relationships of structure and function to endothermy were also analyzed. The nasal conchae of the...
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From:Science (Vol. 284, Issue 5414) Peer-ReviewedLONDON--Nearly 200 paleontotogists, developmental biologists, molecular phylogenists, and other researchers gathered here on 8 and 9 April for a meeting on "Major Events in Early Vertebrate Evolution." They heard that...
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From:Science (Vol. 286, Issue 5442) Peer-ReviewedEvolution went on a creative spree about 540 million years ago. Over the course of less than 20 million years during the Early Cambrian period, a huge diversity of animals appeared for the first time, including many of...
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From:American Scientist (Vol. 82, Issue 6)A phylogenetic analysis of living and fossil vertebrates reveals interesting facts about the evolution of vertebrates. Findings suggest that the hagfishes are the most primitive vertebrates and that majority of...
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From:Atlantic Geology (Vol. 40, Issue 2-3) Peer-ReviewedABSTRACT The first fossil tetrapod footprints that were discovered on Prince Edward Island, and which were previously undescribed, are small reptilian trackways assignable to the ichnogenera Notalacerta and...
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From:Science (Vol. 237) Peer-ReviewedA Reassessment of Astraspis desiderata, the Oldest North American Vertebrate SINCE THE DISCOVERY OF VERTEBRATESin the Ordovician (470 million years ago) Harding Sandstone of Colorado in 1892 (1), only two other...
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From:American Zoologist (Vol. 39, Issue 5) Peer-ReviewedThe Dlx3 and Dlx7 genes cluster together and have important roles in the development of vertebrates. In mice, Dlx3 is expressed in the teeth, hair follicles, and limb buds which are derived from epithelial mesenchymal...
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From:Science (Vol. 228) Peer-ReviewedA characteristic of the human motor system is its high degree of versatility, which far surpasses that of other animals, even though particular types of movements can be carried out in individual species with a much...
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From:Nature (Vol. 492, Issue 7427) Peer-ReviewedAuthor(s): Philip Barron Abitua [1]; Eileen Wagner [1]; Ignacio A. Navarrete [1]; Michael Levine (corresponding author) [1] Neural crest arises at the neural plate border, expresses a core set of regulatory genes and...
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From:The Biological Bulletin (Vol. 202, Issue 2) Peer-Reviewed[[DELTA].sup.9]-tetrahydrocannabinol, the psychoactive ingredient of cannabis, exerts effects in humans by binding to the G-protein-coupled cannabinoid receptors [CB.sub.1] and [CB.sub.2], which are expressed in the...
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From:Canadian Journal of Zoology (Vol. 96, Issue 4) Peer-ReviewedIdentification of critical habitat is central to major conservation laws protecting endangered species in North America and around the world. Yet the actual ecological research that is required to identify which...
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From:Nature (Vol. 455, Issue 7214) Peer-ReviewedThe oral cavity of vertebrates is generally thought to arise as an ectodermal invagination (1,2). Consistent with this, oral teeth are proposed to arise exclusively from ectoderm, contributing to tooth enamel...
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From:Evolution (Vol. 50, Issue 2) Peer-ReviewedMethanogenetic bacteria in the intestinal tracts of vertebrates permit the digestion of biopolymers that cannot be broken down by digestive enzymes. A hypothesis that some vertebrate taxa have a heritable competence for...
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From:American Zoologist (Vol. 39, Issue 3) Peer-ReviewedDetermination of paired fin or limb number, identity and position are key issues in vertebrate development and evolution. Phylogenies including fossil data show that paired appendages are unique to jawed vertebrates and...
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From:PLoS ONE (Vol. 15, Issue 6) Peer-ReviewedAuthor(s): Sarah Driessen *, Lambert Bodewein, Dagmar Dechent, David Graefrath, Kristina Schmiedchen, Dominik Stunder, Thomas Kraus, Anne-Kathrin Petri 1 Introduction More recently, the installation of new...
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From:Georgia Journal of Science (Vol. 71, Issue 2) Peer-ReviewedABSTRACT We present the findings of a survey of small vertebrates inhabiting a typical central Georgia (Baldwin County), mixed pine-deciduous Piedmont forest. Samples were collected from June 2010 to November 2010...
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From:Nature (Vol. 588, Issue 7837) Peer-ReviewedRecent analyses have reported catastrophic global declines in vertebrate populations.sup.1,2. However, the distillation of many trends into a global mean index obscures the variation that can inform conservation...
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From:PLoS ONE (Vol. 10, Issue 5) Peer-ReviewedVertebrates are a vital ecological component of Amazon forest biodiversity. Although vertebrates are a functionally important part of various ecosystem services they continue to be threatened by anthropogenic impacts...
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From:PLoS ONE (Vol. 11, Issue 11) Peer-ReviewedThe Carajás National Forest contains some of the largest iron ore deposits in the world. The majority of the minerals are found below a plant community known as Savana Metalófila, or "Canga", which represents...
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From:PLoS ONE (Vol. 11, Issue 2) Peer-ReviewedDuring development of the vertebrate neuroepithelium, the nucleus in neural progenitor cells (NPCs) moves from the apex toward the base and returns to the apex (called interkinetic nuclear migration) at which point the...